Annular seal
CA 1340606 C · Owner: Kilthau, Gerhard · Inventors: Kilthau, Gerhard; Spies, Karl Heinrich; Vogt, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An annular seal, in which a sealing lip of elastomeric material is pressed by elastic tension onto the cylindrical surface of a shaft. The cylindrical surface incorporates indentations which have concave lower parts. The maximum depth of the indentations amounts to 4-12 micrometers and in the, area of its total outer periphery each indentation is enclosed by the lower parts of adjacent indentations. The intervals between the centre points of the indentations are so small that the adjacent ones define each other at their intersecting edges.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 22, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 22, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.